Very Computer

When I configured the system, I had 256 MB RAM, so I setup 2 swap partitions
each 256MB.
Also, I didn't expect the need to go beyond 512MB. But, I'm doing database
development.
Now I want to upgrade the machine to 1 GB RAM, would it be safe without
increasing swap?
I have more space left on the hard drive, but I can't move the 4 unknown
partitions at the end.
I have RedHat 6.2 (2.2.16)

Current fdisk:
Command (m for help): p

Disk /dev/hda: 255 heads, 63 sectors, 4982 cylinders
Units = cylinders of 16065 * 512 bytes

   Device Boot    Start       End    Blocks   Id  System
/dev/hda1   *         1         3     24066   83  Linux
/dev/hda2             4      4982  39993817+   5  Extended
/dev/hda5             4       264   2096451   83  Linux
/dev/hda6           265       525   2096451   83  Linux
/dev/hda7           526       786   2096451   83  Linux
/dev/hda8           787      1047   2096451   83  Linux
/dev/hda9          1048      1308   2096451   83  Linux
/dev/hda10         1309      1569   2096451   83  Linux
/dev/hda11         1570      1602    265041   82  Linux swap
/dev/hda12         1603      1635    265041   82  Linux swap
/dev/hda13         1636      1896   2096451   d3  Unknown
/dev/hda14         1897      2157   2096451   d3  Unknown
/dev/hda15         2158      2418   2096451   d3  Unknown
/dev/hda16         2419      2679   2096451   d3  Unknown

Any help would be greatly appreciated.

Thanks

Ken