Jailbreak help (iOS 4.2.1)

[JD3V3N3Y]

Hello all! First, i would like to say that I have recently recovered my iPod from an iBrick thanks to the helpful user(STRAYunINFIDEL) on this forum. I am trying to jailbreak on 4.2.1(just had to recover my jailbroken 3.1.2 that somehow had no shsh's) using redsn0w 0.9.6b6 but I also have redsn0w 0.9.6rc8(and i've tried that too w/same results). once I choose an IPSW for the correct firmware, it asks me if I have the MC model of the iPod touch 2g (i have the MB model) so I click no. the preparation loading box comes up and only one bar stays up for about a minute then it says this:

(in case the image is broken, it says 'Unexpected error during preparation')
any suggestions??

[Simon]

Whats the filename of the .ipsw you are browsing for with redsnow?

[JD3V3N3Y]

iPod2,1_4.2.1_8C148_Restore.ipsw

[Simon]

And it has a white cube like icon right?

[JD3V3N3Y]

yes i got it from this url: iPod, iPhone and iPad Firmware Download

[Simon]

Are you running redsnow in windows xp sp2 compatibility mode?

[JD3V3N3Y]

no... man if this works, i'm gonna feel stuuuuuupid

but wait, how do i do that? (I went to properties>compatibility and it won't let me do winxp sp2)

[Simon]

Just looked at your pic again. You are on xp already. Try this, run redsnow then open task manager. Right click on redsnow.exe under processes and choose set affinity, uncheck all but one processor then try redsnow again.

[JD3V3N3Y]

well of course i already knew i was on xp, but im on sp3 so i thought there was a compatiblility mode for sp2... but anyway, i'll try this

still not working

[Simon]

Try downloading the firmware again from a different site, and use firefox to download it if you have it.

[JD3V3N3Y]

o alright, i was on chrome but i do have firefox installed

it's downloading

didn't work

[Simon]

Do you have another computer you can try it on?

[JD3V3N3Y]

well, will redsn0w run with 256 mb of ram?

[Simon]

Not too sure

[JD3V3N3Y]

thought so haha... that pc is from like Half Life 1 times :/
would it be safe to try?

[Simon]

I dont see how it could hurt it. Worth a shot. Make sure the latest itunes is on it first.