Right near the top on the left side of Subsim home page you will find this link:
SH4 Patch 1.4 released!
http://www.subsim.com/radioroom/showthread.php?t=125812
When people ask if a file is big it usually means they are on dialup. Nearly all game paches these days are painfully large for diaup users and I'm sure this one is too.
-Pv-