Here is the Save Game Editor for Hitman: Blood Money (PC Version) that was uploaded by an unknown user of HitmanForums. After the HitmanForums were revamped, this editor was lost in the shuffle. This is a re-upload of the same. I do not own this tool, nor did I make or edit it in any way.
This Editor can be used to add money to the player's profile. It can also be used to unlock beta, hidden or otherwise unobtainable weapons. The firearms such as the Custom 1911, Real World War I Pistol and Mark III Rifle can be added and used on any level. Melee weapons can only be used on the levels they're present on or programmed to appear on. I have included a .txt file detailing the melee weapons usable in the corresponding level. Melee weapons include Angelina Mason's Bowie Knife which is not normally usable etc. Unfortunately, the Hammer is not included in the list of melee weapons.
I've also included an edited save profile with all the hidden weapons added, max money possible, all standard weapons collected, and all weapon upgrades purchased @ Professional difficulty.