---> find skin in downloaded ArcGIS API for FLEX\arcgis_api_for_flex_3_0\ArcGIS_Flex\skins\src\com\esri\ags\skins\AttributeInspectorSkin.mxml---> include skin in to your project (rename if needed)---> add skinClass attribute to your ispector with reference to included skin...
<esri:AttributeInspector id="attributeInspector"
visible="false"
includeInLayout="false"
skinClass="ee.alphagis.assets.skins.MyAttributeInspectorSkin"
...
---> in skin find <mx:Form> tag<!--- Form to display the attributes of the active feature. -->
<mx:Form id="form"
width="100%" height="100%"
enabled.disabled="false"
horizontalScrollPolicy="off"
maxHeight="{hostComponent.getStyle('formMaxHeight')}"
verticalScrollPolicy="auto">
---> configure form layout NB! examples you looked forfor example:<!--- Form to display the attributes of the active feature. -->
<mx:Form id="form"
labelWidth="100"
...
---> other way is work (need some dev. exp.) with Fields used in attribute inspector:DoubleFieldIntegerFieldStringField... and others in same packageyou can extend them, skin them, also create own fields ...