rpm -ihv xtrkcad-\e{VVV}.i386.rpm
cd /usr/local/lib
tar xvfz xtrkcad-linux-elf.VVV.tar.gz
xtrkcad
and untar all files into it.
cd /usr/local/bin
ln -s /usr/local/lib/xtrkcad/xtrkcad xtrkcad
XTRKCADLIB
environment variable to point to that directory.