hmm with this step Jam don\'t work,..
after make I run jam install but command not found..
then I go to bin.linuxx86 dir and run jam install
but he sayd can\'t find Jamfile
Ok then I copy all files from bin.linuxx86 dir to jam install dir
and then I do
jam install
... now all is OK :-)
root@user136mo jam-2.5]# ./jam install
...found 201 target(s)...
...updating 1 target(s)...
Install /usr/local/bin/jam
Chmod1 /usr/local/bin/jam
...updated 1 target(s)...
now when I type jam I get this :
[root@user136mo /]# jam
Jamfile: No such file or directory
...found 7 target(s)...
its ok ? I think yes,...
thx for helping my (with string jam install.. because I try combine only jam jamfile ..etc

)
edit : This is my clear way to install jam : (maybe some ppl need use this way too .. add this to linux howto ? )
tar -xzvf psjam-2.5rc1.tar.gz
cd psjam-2.5rc1
make
su # then type your root password
// (NOW THIS IS WHAT I NEED TO DO)
cd bin.linuxx86
cp * ..
cd ...
// AND THEN :
./jam install
exit
(simply I have jam exec in psjam-2.5rc1/bin.linuxx86/ dir
but jamfile in psjam-2.5rc1/ only.. )