In answer to your Qs
1. im running new mobo...there isnt an osx installed on it to get the dsdt.aml file from.
Extract your original DSDT.aml file off the PC using the Ubuntu Live DVD, plug in a FAT32 formatted USB flash drive and then go to the Terminal and type either
cd /media/"Volume name of the USB flash drive" sudo cat /sys/firmware/acpi/tables/DSDT > DSDT.aml
for Ubuntu 11.xx and later, or
cd /media/"Volume name of the USB flash drive" sudo cat /proc/acpi/dsdt > DSDT.aml
for Ubuntu 10.xx or earlier. In either case, the extracted DSDT.aml file should have been saved on the USB flash drive, for later decompiling, patching and recompiling using iasl or iasl based tools, so send me a download link for your extracted DSDT.aml file....
You can use your Snow Leopard OS on the other MOBO to set up the OS X Mavericks USB installer.....
2. how do i know which one? ive got core 2 quad. my snow leopard install says my old setup is an imac lol but this is totally diff mobo
For a Core2Quad CPU, as I have, you can use smbios.plist for MacPro3,1 (use the one from MaLd0n's Lion installation via USB stick using Chameleon, DP4, GM and FINAL topic…….)
3. where do i find this particular modules folder?
It is an install option in the Chameleon bootloader package installer that you can download form IM downloads section....