Ok before I start im using:
PS2 V.4
MC Exploit loaded with codebreaker and USB Drive
I use cogswap to play backups with an original GTA:VC game since its high TOC
I use a slide card
I do not have a mod chip

I have successfully made and played Backups/etc of:
Splinter Cell:Chaos Theory
Metal Gear Solid III:Snake Eater
Motocross Mania III
PGEN with roms
SNES with roms
A homebrew collection disk

All of the above I have tested to make sure that they worked after trying these failed backups:
Timesplitters:Future Perfect
Brothers in Arms.

I am NTSC and made sure every game was patched correctly if it was originall PAL.

I use TDK DVD+R which worked perfectly for me for the ones that worked but if anyone knows how to get Timespitters Future Perfect and Brothers in Arms to work I would greatly appreciate it and/or if someone else has got them to boot without a modded ps2 please tell me. I ran out of DVD+R's trying to burn many copies of this so I will buy some more tomorrow if anyone has any suggestions.

Thanks,
sk8npirate