JDK leaves temporary files undeleted, can they be safely deleted?

[Femi Alla]

My notebook boots 2 operating systems, windows XP, 2000 Server and Red Hat Linux 9.0. It turns out that I spend more time on XP and as such it has so many installed applications and I am regularly seeking ways to free up space on the hard drive. I have observed that the JDK places a space consuming setup application in the E:\Documents and Settings\Femi Alla\Local Settings\Application Data directory at the start of the JDK installation. But never removes it afterwards. It sits there consuming space.
Not being sure why this application was sitting there, I left it. But decided to delete it after I upgraded my JDK and it remained.

You may have to �show hidden folders� to view the folders in question.

Location:
<Drive Letter>:\Documents and Settings\<User Name>\Local Settings\Application Data\{32A3A4F2-B792-11D6-A78A-00B0D0150030}\
These two make their home here:
J2SE Development Kit 5.0 Update 3 (Size:51MB )
1033.MST

Location:
<Drive Letter>:\Documents and Settings\<User Name>\Local Settings\Application Data\{32A3A4F2-B792-11D6-A78A-00B0D0150000}\
The files:
Java 2 SDK, SE v1.5.0.msi
1033.MST

There exists something similar at <Drive Letter>:\Documents and Settings\<User Name>\Application Data\Sun
But this folder seems to be more useful than the other one.

Can anyone offer useful any explanation about these folders?