"also, another thing i noticed is that, before the fix, the rpms would go up to like 1500 when i first started the car with a cold engine. now it's not doing that anymore... is this ok?"
Yes.
"i went with the smaller of the 2 suggestions for the SVT fix. should i try the bigger hole or just wait for the computer to learn more new positions for the IAC?"
The 500 RPM should fine.
