Sun Solaris x86
First, go get another HDD 80GB or bigger and image your old HDD to the new one. Powerquest makes good products to do this, e.g. DiskCopy, Drive Image or Partition Magic (PM). PM is the most flexible, you'll have to copy partition by partition though. Once your data is safely backed up use PM to expand, shrink, copy or move whatever partitions you want. I've successfully used PM to do this very thing but I wasn't overlly concerned about data loss so I didn't bother to back it up and everyhing remained in tact. Take the risk (small risk) if you can't get another HDD, but if you're worried about data loss you should back up.