1. Make a .txt file
2. go to the lag page on the wiki
3. find the example of the command line to change mtu and copy paste to the txt file
4. Change the number to whatever you want to set mtu to (since vista/7 users can change mtu at runtime, there is little reason to worry about setting it to low, so go ahead and use the lowest one possible(48))
5. save, and rename with ".txt" changed to ".bat"
6. make another .bat file for changing mtu back to 1500
7. start Mabinogi, log in to the character selection screen
8. right click the 48 mtu .bac file, click run as admin
9. click allow on the UAC
10. get pissed off that the UAC crashed the client and write an angry email 2 both to Nexon and to Microsoft
11. run the 1500 mtu .back file as admin (cause some people have trouble getting HS to load at 48 mtu)
12. repeat step 7-11 till the client doesn't crash on the UAC message
13. select a character and finish logging in
14. repeat step 11 so you can browse the web while playing mabi
15. repeat step 10