You really don't need to divide by 60, and removing that will increase the speed 60 times:

[pascal] if (buffer[DIK_LEFT] and $80) <> 0 then
F_MapBuilder.Player.PosX := F_MapBuilder.Player.PosX - ((tick - F_LastCheck) * 5)
else if (buffer[DIK_RIGHT] and $80) <> 0 then
F_MapBuilder.Player.PosX := F_MapBuilder.Player.PosX + ((tick - F_LastCheck) * 5); [/pascal]

It all depends on the size of your world...