Service packs are cumulative. Therefore, each new service pack contains all the fixes that are included in previous service packs, and also includes any new fixes. You do not have to install a previous service pack before you install the latest service pack. For example, you do not have to install MDAC 2.5 Service Pack 1 (SP1) before you install MDAC 2.5 Service Pack 2 (SP2).
For additional information about how to obtain MDAC 2.5 service packs, click the following article number to view the article in the Microsoft Knowledge Base:
293312
INFO: How to Obtain the Latest MDAC 2.5 Service Pack
For additional information about what is fixed
in MDAC service packs, click the following article number to view the article
in the Microsoft Knowledge Base: 293311
INFO: List of Bugs Fixed in MDAC 2.5 Service Pack 2