Suggestion: Go to Windows Update and have your computer
scanned. Then you can select all the Critical Updates
recommended for your computer and have them installed
right then and there. That will get you up and running
with all the updates you need (download and install any
additional patches issued between now and release of the
service pack) to tide you over until Service Pack 2 is
formally released in 2-3 months (probably). That service
pack will make most if not all of the patches we
currently have installed on our machines moot. Then you
can go to your sister's home and download Service Pack 2
and any patches not included in Service Pack 2 (you've
made a note, haven't you) and burn them to CD on her
computer. Probably, however, Microsoft will make
available a CD of Service Pack 2. There has been some
speculation that they might place such CDs in stores
around the country. Don't count on it though, because it
is mere speculation.
You can't copy patches your sister has installed on her
computer, unless she has first downloaded them to a
folder on her hard drive, which it does not sound like
she has done. Also, unless you are both running
comparable operating systems and computers with the same
bit architecture, you could run into problems using her
patches.
Internal CD-RW drives have gotten to be so cheap, you
could get one for a small amount of cash and have it
installed into an empty bay in your computer assuming you
have an empty bay. If no empty bay is available, there
are external drives available, but they are more
expensive.