Its only firmware 1.5 for CS2D.
Note: the controls may be werid on the PSP, try to config different controls in the notepad included in CS2D for PSP.
GAME: http://dl.qj.net/CSpsp-v1.0-PSP-Homebrew-Games/pg/12/fid/12379/catid/195
Mapeditor:
http://dl.qj.net/Unofficial-CSpsp-Editor-PSP-Homebrew-Games/pg/12/fid/12572/catid/195