Custom Flash Theme looks awesome but in order for you to use it flashing is required or you can convert it to CTF but you don't know how, then here's a guide that will help you every step of the way.

Requirement:
1. Theme Converter here
2. PTF wallpaper file in 480x272, 24Bit true color, BMP format
3. PTF icon file in 16x16, 256 colors, PNG format
4. PTF preview file in 300x170, 24Bit true color, BMP format
5. Supported prx [common_plugin.prx,paf.prx,vshmain.prx] get it by decrypting 4.01 eboot here
using Red Squirrel RSPsar Dumper v3.5
here


Steps:
1. in 'Information tab', just fill some text data as you want. It really doesnt matter



2. in Wallpaper tab, fill in your preprared wallpaper bmp



3. in last tab, 'others", fill in your preprared png icon and bmp preview



4. in File menu, select "Export", give it a name as you want. remember this name. (eg. 390Applecor.ptf)



5. You have successfully made a PTF

*use custom flash themes (VSH & FONTS) compatible to your cfw*

6. Now prepare the support prx and from this point you can either use Red Squirrel CTF Manager v2.0
here
or

do it manually using Poison CXMB 3.2.1 full version
here

6.1 Copy the new PTF into MS0:/cxmb folder
6.2 Edit file in MS0:/cxmb/conf.txt, change the ctf filename as your new theme then save, in this case, it will look like:

/PSP/THEME/390AppleCor.CTF



** preview PTF filename must be same as CTF one **

6.3 Put your theme files under MS0:/cxmb, like

/cxmb/fonts
/cxmb/vsh/



6.4 Reboot your PSP, you can see your MS LED flashing. After done, you will see PSP is booting with your theme.

here is the result:



note:
- if there is no corresponding ptf under /cxmb, ctf cannot be built.
- if system shutdown itself during building ctf, check your prx/rco version. incompatible version files results ctf building failure