Running Gaim On Dapper

Why do you need beta6 only?

you can try rpm from sourceforge. convert it to deb using alien

Perhaps he needs the Network-Manager support with Gaim. You could perhaps try *repository.debuntu.org/. Or compile it yourself.

I downloaded some file named "gaim-2.0.0beta6.tar.gz".
When I ran ./configure after decompressing it, it gave following error msg
.
root@baba-desktop:/home/baba/Desktop/gaim/gaim-2.0.0beta6# ./configure
checking build system type... i686-pc-linux-gnuoldld
checking host system type... i686-pc-linux-gnuoldld
checking target system type... i686-pc-linux-gnuoldld
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... no
checking for sed... /bin/sed
checking for gcc... no
checking for cc... no
checking for cc... no
checking for cl... no
configure: error: no acceptable C compiler found in $PATH
See `config.log' for more details.

Its actually a difficult task to compile gaim! Try the debuntu.org repository mentioned by Possible.. And as for your error, you dont have gcc installed.. Do "sudo apt-get install build-essential" to install the necessary compilers..

For a while I forget about beta6.
How to install gaim any way. i accedently deleted it and want it back.
I wanted to upgrade Gaim 1.5 because it kept crashing. Doing so I deleted.

Deleted it. that's the mistake you made. Why are package managers there for? Sitting and staring at?
Open the package manager and install gaim from it.