The installer is asking for a file by name " +486 "
Make an empty text file and see the message disappear.
But the 1.4.2_06 packages from Sun are corrupted,
"rpm.bin" and ".bin"
A usable package can probably probably be found on
the Suse 10 install DVD :
( I have a copy )
j2sdk-1_4_2_04-i586-3.tgz is here