cintro (risk free) compability with what CFW?

Im running 3.90 M33-3 and i know its not compatible. But what other CFW will it run on if i wanted to dg?

Also, if i want to change my cintro, ill have to put it into the flash0 right? Is there a size limitation then since its on the flash of my psp (and if so, what is it?)

Thanks

You can use my FlashFree Cintro mod
There is a tutorial in the Tutorial section

yeah i tried that, but you said you need 1.50. Only way to do that is through timemachine yes?

My main concern with time machine is i use 2 ms. 4g and 1g. 4g is what i use most, games, apps and its where i would install TM. The 1g has movies and music. TM 1.50+3.40 has issues with media. So will switching back and forth with two mem sticks, where one has TM and the other not have any negative side effects?

Aso, your tutorial has the regular sony intro after the cintro is played right? any way to go around that?

There is a 3.xx Kernel version, but its... Crappy...