OK, no problem. We're all here to learn right? UHCI is USB 1.1 and EHCI is USB 2.0. 1394 is Firewire. Thats all for that part.
Now motherboard manufacturers, will call them all kinds of different names in their ACPI tables, because they can. But they really like them to be 4 digits, and when having more than one of the same type of device, they usually will want one of those 4 digits to be a number, because numbering things is a good way to count them last I checked. So, you almost always have 2 separate EHCI devices and therefore can't call them both EHCI. So rather than call one EHCI and the next one something that doesn't make sense like EHCJ, Apple and some other mobo makers just use the first 3 digits or a 3 digit abbreviation of the device's name, followed by a number, and then only the number needs to be changed for each additional device. If it's a device that you would not have more than one of, the it get a full 4 digit abbreviation, and sometimes just a 3 digit abbreviation. Still with me? Ok, so Intel or ASUS or whoever may make a motherboard, don't care if these 4 digit names make sense to you or not, so don't always expect them to, and don't expect them to match what the device may be called in your bios settings or even in a DSDTSE patch. The naming used in DSDT is mostly cosmetic, but you can't just go renaming stuff without all the other references to that device being changed as well, so no need to go renaming things just for fun, because it probably won't turn out all that fun. So because the device names vary from board to board, tools like lspci become very useful, as hardware addresses are set in stone (or at least in thick mud). So if your applying your changes to the correct hardware address, your applying it to the right device too, no mater what it may be called. There are a few device hardware addresses that are almost always the same regardless of what mobo you have. For example. HDEF at 0x001B0000, LPC at 0x001F0000(note LPC is 3 digits, so it may have another digit, usually a letter tacked onto it), your GPU can be called a million different names in DSDT like POP1, PEG1, or PEGP if you renamed it for HDMI. On desktop it's hardware address will usually be either 0x0001000 or 0x0003000. and at 0x0002000 for laptop/onboard GPU's.
Now in your case, your 2 EHCI entries are named EUSB and USBE respectively. Why are they named this you ask? Because that's what they named them. Your UHCI devices are named USB0, USB1 etc. Again, that's just what they decided to call them, and felt zero was a good number to start with since it's not technically even a real number. Apple would call them UHC1, UHC2, etc. If I was making the mobo, since they are USB 1.1 they would have been called OLD1, OLD2, OLD3, or SLO1, SLO2, etc, and everyone would know all they need too right there
So, there you have in 2 minutes, what took me at least a month or more to learn, and of course I'm still learning too.
My last bit of advice...Don't beat yourself up trying to get something working that you didn't even know wtf it was a couple days ago, You can always give it another go a bit later when you not feeling overwhelmed by all this new stuff and just take it one step at a time, no need to learn to run before you learn to walk. Leaving your PC on won't hurt it. If your fans are too loud, maybe your fans are too loud? They make quieter ones, fan controllers to slow down the loud ones when temps aren't high, vibration dampers, sound padding, water cooling, etc, etc. A computer does not need to be asleep to be quiet. Shutting it down and starting it up is also something people have been doing since shortly after the caveman days, and it's seemed to work pretty well too. Things like "not having my computer do such and such is not an option!" means your in the wrong place all together, and need to be on Apple support forums talking about your real mac, cause a thing or two not working on a hackintosh, comes with the territory.