Since that pesky re-write is coming up, I know that this will most likely be patched, so I will release what is probably my most favorite exploit.
I have been utilizing this method for over 2 years with no issues.
**** You must be on Hellquest for this method to work properly.
you must have at least 1 bank space for this to work.
Step 1. Goto the bank or click your bank pet
Step 2. Once the bank is open, click on 2 items (one in your inventory, one in the bank) NON-AC obviously
Step 3. Open the Hellquest packet sniffer on the right hand side by click start
Step 4. Swap the items you selected in step 2
Step 5. You should see one packet pop up, do not touch it.
Step 6: now with the packet sniffer still on, find the item you swapped earlier from your inventory in your bank (the one in your bank now) and swap it with another item that is in your inventory.
Step 7: You will find you now have 2 packets in your packet sniffer on Hellquest. %Bankswap% <---- something starting with something similar to this.
step 8: click on the 1st packet, the one you got from the very first item swap.
step 9: the item will disappear from your inventory, but don't worry, when you relog you should see it in your bank, and you should see you've exceeded your limit (2/1)
I have used this method, and have had thousands of items in my bank via this method.
If it worked for you leave a Thanks and if you have any questions reply and I will get back to you.
P.S Hellquest can be found via this link https://www.mpgh.net/forum/showthread.php?t=990728 posted by LunarX
you could also technically add a shit ton of BS items to your bank via this method, then when the server rewrite occurs, swap said useless items out with good ones in your inventory and still have a lot of space.