for one thing it would be alot better if you upgraded to 10.2. This lets you use the most recent software specifically built for Slackware.
Second on
www.linuxpackages.net they have specific packages for Openoffice 2.0 for Slackware 10.2(this is why you should upgrade).
Third with the program "rpm2tgz"(tgz is the Slackware binary package compressed file) you can convert rpms to tgz.
I would recommend upgrading to Slackware 10.2 with the instructions on the first slackware disk. you can even look at the instructions for how to upgrade on the 10.1 disks you have(they are the same instructions).
I would also recommend using the tgz packages off of
www.linuxpackages.net as they have optimizations for slackware. Try to avoid rpms when there is an identical package specifically built for slackware.
Note: you install slackware packages with "installpkg filename.tgz" as root.