Ah, yes, so it is, relatively. I remember doing much the same to make an XP SP2 installation disk. Never used it in earnest; only as a repair disk for another XP PC.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC