nope. just searched for you in the psp ripkits section and could not find any ripkit.
you can use winrar. just install winrar and right click the .iso file, choose "extract...."
UPDATE: you can try this guide to remove all languages except english
just open the iso with the UMDGen. Select Atari\PSP_GAME\SYSDIR\UPDATE and right click on each file and select "Dummy". Then pick all 0_PSP0.RWS and 2_PSP0.RWS files in every single SPEECH folder (from LVL001 to LVL014) and select "Dummy". Click on the toolbar in "Dummy Search". Now save the compilation. You can compress it to cso.
alternatively, you can also delete those non-english files if you cant dummy them,
yes. this game is the same as arthur and the minimoys. just a diff. game name, thats all.