Advertising in iFrames on free sites - is it ok? +questions

[Pasha]

Hello, guys&gals!

Back to business after 9 years break (not in prison though - as you could think ) - need few advices before I start.

1) Going to make lots of free sites at once - not sure about which sponsor is better and want to have ability to replace ads on all sites at once without too much coding - possibly by using iframes.
Is it ok with LLs/TGP rules to show sponsor's ads in iFrames on free sites?

2) what is TGP2 exactly?
=)

3) Sites' URLs will look like http://myporn.com/free/site1/ + all pictures (with random generated names) from all sites stored in same directory http://myporn.com/pix/.
Is it OK to use dynamic scripts to generate freesites while all pictures stored in one (other than site's adress) directory?

Thanks in advance!