convert .sav file sizes

how do i convert my pokemon Soulsilver(U) 512kb .sav to a 4MB .sav file?
is there a program for this, because shunys website only converts it to 512kb. (max limit)

if i may ask (idk how to) why do you need a 4 MB .sav? isn't 512KB enough>?

to transfer to my retail cart so can use pokewalker

2 questions...1. how you gonna get it on retail cart?2. why not use it with a FC?

Replying to #4

A1: by using this thing called NDS Adaptor plusA2:can't use pokewalker on FC
theres a special IR port only in retail ones

i'm also wondering, and i'm gonna use examples, i think, how can the retail; cart use a .sav size higher than 512K if Pokèsav only is capable to generate AR codes for a .sav file that is either a 512k or a 2 something k.....

shows save size in picture here:http://gbatemp.net/index.php?showtopic=221936

have you tried just adding it? because more than likely, it will just make it the correct size....

i even tried setting the save size to 4M on my acekard2i and playing it again to see if that would work but it only gives me 512kb

maybe it has to be originally created as a 4MB save....