...Moving this post from my old blog as a reminder to myself...
Here's the XML for the workflow feature files since the snippets don't seem to ever work.
Feature.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- _lcid="1033" _version="12.0.3111" _dal="1" -->
<!-- _LocalBinding -->
<!-- Insert Feature.xml Code Snippet here. To do this:
1) Right click on this page and select "Insert Snippet" (or press Ctrl+K, then X)
2) Select Snippets->SharePoint Workflow->Feature.xml Code -->
<Feature Id="GUID" Title="FEATURE_TITLE" Description="FEATURE_DESCRIPTION."Version="12.0.0.0" Scope="Site" ReceiverAssembly="Microsoft.Office.Workflow.Feature, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" ReceiverClass="Microsoft.Office.Workflow.Feature.WorkflowFeatureReceiver" xmlns="http://schemas.microsoft.com/sharepoint/">
<ElementManifests>
<ElementManifest Location="workflow.xml" />
</ElementManifests>
<Properties>
<Property Key="GloballyAvailable" Value="true" />
<!-- Value for RegisterForms key indicates the path to the forms relative to feature file location -->
<!-- if you don't have forms, use *.xsn -->
<Property Key="RegisterForms" Value="*.xsn" />
</Properties>
</Feature>
Workflow.xml
<?xml version="1.0" encoding="utf-8" ?>
<!-- _lcid="1033" _version="12.0.3015" _dal="1" -->
<!-- _LocalBinding -->
<!-- Insert Workflow.xml Code Snippet here. To do this:
1) Right click on this page and select "Insert Snippet" (or press Ctrl+K, then X)
2) Select Snippets->SharePoint Workflow->Workflow Template->Workflow.xml Code -->
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
<Workflow Name="WORKFLOW_NAME" Description="WORKFLOW_DESCRIPTION" Id="GUID" CodeBesideClass="ASSEMBLY_NAME.PRIMARY_WORKFLOW_CLASS_NAME"
CodeBesideAssembly="ASSEMBLY_NAME, Version=3.0.0.0, Culture=neutral, PublicKeyToken=PUBLICKEYTOKEN"
TaskListContentTypeId="0x01080100C9C9515DE4E24001905074F980F93160"
AssociationUrl="_layouts/CstWrkflIP.aspx"
InstantiationUrl="_layouts/IniWrkflIP.aspx"
ModificationUrl="_layouts/ModWrkflIP.aspx">
<Categories/>
<!-- Tags to specify InfoPath forms for the workflow; delete tags for forms that you do not have -->
<MetaData>
<Task0_FormURN><!-- infopath urn --></Task0_FormURN>
<StatusPageUrl>_layouts/WrkStat.aspx</StatusPageUrl>
</MetaData>
</Workflow>
</Elements>