Read the PES3 ripping thread to find the tools you need to rip it.
Read the Patching Guide thread to find the patching and burning tools.
To connect to lomungtung, read the lomungtung thread first and make sure you read the rules. Configure Flash FXP so that you have a download speed limit of 10KB and a limit to 2 files downloading at once. Then use the username and password which are both "we". This should get you in.
To extract/uncompress the patch files, you will need WinRar.
To download software, a good way is to go to www.google.com and type in the name of the software and then 'download'
Eg. Type in google, "Download WinRar" and you should get a link to www.rarlab.com/download.htm
Repeat this with other files.
Or try going to www.download.com
Some programs need to be paid for so you may have a month's trial of it before you'll need to enter a code for it to work.