Rephrase:
a full-blown IDS/P solution is very expensive and inordinately complicated for .............,in many cases, remote or distributed large enterprise locations where an integrated, dedicated system is easier and more cost-effective to deploy, maintain and update.

The full blown IDS/P solution is expensive for remote/distributed large enterprises that have different locations; an integrated dedicated system is easier......

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Note added at 19 mins (2004-07-12 11:16:48 GMT)
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That means:
In many cases, for those large enterprises that have remote or distributed locations, IDS/P is an expensive and complicated solution. In such cases, an integrated, dedicated system is easier to deploy, maintain and update.

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Note added at 25 mins (2004-07-12 11:22:33 GMT)
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My try:
目前，对大企业以外的组织而言，成熟的IDS/IDP解决方案非常昂贵、非常复杂。而在许多情况下，这对有远程或分布式位置的大企业也一样，这些企业反之采用集成系统将使部署、维护及更新工作更简单、更经济。

Hehehe... 不是很顺，不过意思应该还可以了。