You can now play PSX, PSOne and PS1 with the new Popsloader developed for custom firmware 5.50GEN-A. It’s the full-fledged PSOne emulator we have all been waiting for!
Here’s how to install and set up this CFW:
1. Download Popsloader below, extract it, and copy the contents to seplugins on your memory stick;
2. Create a POPS.txt file under the seplugins directory and add this line to it “ms0:/SEPLUGINS/popsloader.prx” (without the quotes);
3. Download Psardumper;
4. Download the 4.01 firmware eboot;
5. Extract the 4.01 firmware archive and copy EBOOT.PBP to the root of your memory stick;
6. Using Psardumper, dump and decrypt 4.01;
7. Copy ms0:/F0/kd/impose.prx to the seplugins/popsloader directory;
8. Depending on the firmware version you wish to use (see the above screenshot), download the corresponding firmware eboot here;
9. Again, decrypt that firmware eboot using Psardumper;
10. Rename the following:
* 3.00 - 3.03: pops.prx, popsman.prx, meaudio.prx, pafmini.prx
* 3.10 - 3.30: pops.prx, popsman.prx, pafmini.prx
* 3.40 - 4.01: pops.prx, popsman.prx, pafmini.prx, libpspvmc.prx
to popsXXX.prx, popsmanXXX.prx (XXX being the firmware version, ie. pops310.prx), and so forth for each file;
11. Copy the new renamed files to the ms0:/seplugins/popsloader directory;
12. Enable Popsloader via the recovery console;
13. Copy your PSOne game eboot to your GAME folder and enjoy!
Thanks to homebrew coder GENyUS we can now play more PSX games with this latest CFW. If you already have the Popsloader 5.00 installed, however, simply overwrite that old version by re-installing this 5.50. It will work without any problem, don’t worry.
Download Popsloader for CFW 5.50 GEN-A
Download Custom Firmware 5.50 GEN-A
Download PSP Firmware (EBOOT) Updates

(5 votes, average: 4.80 out of 5)
Im confused about 7 to 11. Wheres the ms0:/F0/kd/impose.prx file? im new to this.. and I don’t mean to be such a hassle.
thanks!
ok so i understand how to do this, but when i go to download a psardumper for firmware 5.50 i can only find a psardumper for 5.0
worried ill brick if i try run psardumper 5.0 in my 5.50 cunstom firmware.
Any help on a link for psardumper 5.50??
Link for psardumper that works with this anybody?
http://dc131.4shared.com/download/68598707/a7389d9e/psardumper_500.rar?tsid=20090727-020207-88483c83
Working PSARDumper.. run it, hit Square, go to the F0 folder on your MS and copy the files above to SEPlugins/popsloader
will it work on psp 2003 ?