I'm using drupal 4.6.x but I can't use any other themes apart from those installed by default (bluemarine, marvin, pushbutton and chameleon). The default theme engine running is xtemplate.

I've downloaded other themes (e.g B7) and copied them to the theme directory but nothing in the administer menu.

I've downloaded phptemplate and copied it to the theme engine directory; then I've got some themes like Blix, rdc, plain1,... that I've copied to the themes directory but still nothing! (there was a bug initially in the phptemplate engine version for drupal 4.6.x that i've fixed - got the solution on a forum. So phptemplate does not have errors produce any errors).

Can anybody help? I'm quite desperate at the moment with that :)