I was searching through the bug reports forum in Ruka's site and found a eboot which works for 3.xx kernel. It is not a version from Ruka, but I tried it and worked in 3.xx kernel (3.90 M33-3). From the filename we can say that it was made to support Slim PSPs.
The post is #87 of this website (at the end of the site):
A direct link to the download is:
Some posts before the one for slim (#75) is also an updated version of Ruka's v.0032 but the 3.xx files don't work, though the one for 1.50 works but I don't know what it fixes or improved.
Link for updated SnesTYL ME++ 0032 Ruka's is:
I hope this wasn't posted before and helps this community :).